linux-kernel - Re: [PATCH] perf, x86: Use extended offcore mask on Haswell

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Message-ID: <20140812055626.GJ9918@twins.programming.kicks-ass.net>
Date:	Tue, 12 Aug 2014 07:56:26 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, eranian@...gle.com,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] perf, x86: Use extended offcore mask on Haswell

On Mon, Aug 11, 2014 at 05:11:30PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> HSW-EP has a larger offcore mask than the client Haswell CPUs.
> It is the same mask as on Sandy/IvyBridge-EP. All of
> Haswell was using the client mask, so some bits were missing.
> 
> On the client parts some bits were also missing compared
> to Sandy/IvyBridge, in particular the bits to match on a L4
> cache hit.
> 
> The Haswell core in both client and server incarnations
> accepts the same bits (but some are nops), so we can use
> the same mask.
> 
> So use the snbep extended mask, which is a superset of the
> client and the server, for all of Haswell.
> 
> This allows specifying a number of extra offcore events, like
> for example for HSW-EP.
> 
> % perf stat -e cpu/event=0xb7,umask=0x1,offcore_rsp=0x3fffc00100,name=offcore_response_pf_l3_rfo_l3_miss_any_response/ true
> 
> which were <not supported> before.
> 
> v2: Post correct patch.
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>

I seem to have this patch; so that means this is a repost right?


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